weather = "下雨"
if weather == "下雨":
    print("带伞出门")

# python是根据代码块层级觉得结束付
# if 条件:
#     下级代码  有空格
age = 15
if age >= 18:
    print("进网吧")
print("不能进网吧")

# if else
if age >= 18:
    print("进网吧")
else:
    print("不能进网吧")

score = 90
# if elif
if score > 90:
    print("牛逼")
elif score == 90:
    print("一般牛逼")
elif score == 89:
    print("可以")
else:
    print("都牛逼")